#include<iostream>
#include<algorithm>
#include<assert.h>
#include<string.h>
#include<deque>
#include <conio.h>
#include<graphics.h>
#include<time.h>
#include<chrono>
#include<cstring>

using namespace std;

string testRamdFunc()
{
	int result = rand() % 10000;
	string s;
	while (result)
	{
		s += (char)('a' + result % 25);
		result /= 10;
	}
	return s;
}

int randvip()
{
	srand((unsigned int)time(NULL));
	return rand() & 1;
}


